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USER MANUAL BC2259 Maruyama
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Illustration of a mechanical device with attached lever and base mount, no text or symbols presentPremium Outdoor Power Equipment

Maruyama. Extraordinary.
Completely read and understand this manual before using this product.
- Read and understand this Instruction Manual before using the brushcutter. Be thoroughly familiar with the proper use of the brushcutter.
- Never allow children to operate the brushcutter. it is not a toy. Never allow adults to operate the unit without first reading the Instruction Manual.
- Become familiar with the controls and know how to stop the engine quickly.
- ALWAYS WEAR SAFETY GLASSES or other suitable eye protection, and hearing protection.
- Keep the area of operation clear of all persons, particularly small children and pets.
- Never operate a brushcutter when you are fatigued.
- Never operate without proper guards or other protective safety devices in place.
- Dress properly; do not wear loose clothing or jewelry. They can be caught in moving parts. Always wear substantial footwear, long pants and long sleeved shirt.
- Gasoline is highly flammable; handle it carefully. Fill the fuel tank with the correct mixture of gasoline and oil before trying to start the engine.
- Use an approved fuel container to store the gasoline/oil mixture.
- Do not fill the tank when the engine is hot or running.
- Do not smoke while handling gasoline.
- Fill the fuel tank outdoors and up to about 10mm from the top of the tank, not the top of the filler neck.
- Wipe any spilled gasoline before starting the engine.
- Always be sure of your footing; keep a firm hold of the handles with both hands, and walk, never run.
- Use the right tool for the job. Do not use the brushcutter for any job that is not recommended by the manufacturer.
- Keep all fasteners tight to be sure the brushcutter is in safe working condition. Follow the maintenance instructions provided on page US-6 of this manual.
- Do not put hands or feet near or under the rotating parts.
- Keep clear at all times.
- If the brushcutter should start to vibrate abnormally, stop the engine and check immediately for the cause. Vibration is generally a warning of trouble.
- Do not trim too close to the ground in order to avoid hitting small stones or other debris. Avoid using the brushcutter near rocks, gravel, stones and similar matter.
- Use the brushcutter only in daylight or good artificial light.
- Shut off the engine and be certain the cutting blade has completely stopped rotating before inverting the machine.
SPECIFICATIONS
| MODELO BC2259 BC2259H B | C329H BC429H BCF429H | BCF509H | ||||
| Dry Weight 4.6 Kg 4.7 Kg 5.9 Kg | 7.6 Kg 7.9 Kg | |||||
| Handle Configuration Loop Handle Horn Handle | ||||||
| Engine Displacement 22.5 cc 22.5 cc 31.8 cc | 41.5 cc 41.5 cc 50.2 cc | |||||
| Fuel Tank Capacity 0.6 | 0.6 | 1.0 | 1.0 | 1.0 | 1.0 | |
| Carburetor | Diaphragm Type | |||||
| Ignition | Solid State System | |||||
| Spark Plug | NGK BPM6Y Set Gap 0,6 - 0,7 mm | |||||
| Fuel Mixture | Use Only Non - Leaded Regular Gasoline.2 - Cycle Oil Mix 25:1 Ratio Must Be Approved For Air - Cooled Engines. | |||||
Product Description
BC2259

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259 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16BC2259H
BC329H
BC429H
BCF429H
BCF509H

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259H 29H 29H 429H 609H 1 2 3 4 5 6 8 9 10 11 12 7 15 16 13 14ASSEMBLY INSTRUCTIONS
ENGINE AND DRIVESHAFT ASSEMBLY
Attach the clutch drum housing to the engine using the four screws.
HANDLEBAR (BC2259H, BC329H, BC429H, BCF429H, BCF509H)
- Loosen the four screws on the top of the clamp bracket.
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Insert the left and right horn handles into the clamp bracket.
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Gearcase
- Drive Shaft Assembly
- Model Name
- Loop Handle
- Attachment Ring for Shoulder Strap
- Throttle Trigger and Stop Switch
- Shaft Grip
- Clutch Drum Housing
- Engine
- Air Filter
- Fuel Tank
- Throttle Cable and Stop Switch Wires
- Debris Shield
- Cutting Blade
- Shoulder Strap
-
Safety Decal
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Gearcase
- Drive Shaft Assembly
- Model Name
- Handlebar
- Attachment Ring for Shoulder Harness
- Throttle Trigger and Stop Switch
- Handle Grip
- Clutch Drum Housing
- Engine
- Air Filter
- Fuel Tank
- Throttle Cable and Stop Switch Wires
- Debris Shield
- Cutting Blade
- Shoulder Harness
- Safety Decal

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Engine Screw (4) Clutch drum housing
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Horn Handle Screws (4) Clamp BracketLOOP HANDLE (BC2259)
- Place the rubber sleeve around the shaft.
- Place the loop handle and the bracket over the rubber sleeve.
- Install the four screws and nuts. Tighten the screws evenly.
STOP SWITCH WIRING
Plug the stop switch wires into the matching connectors from the engine. Note that wire polarity is not important.
THROTTLE CABLE WIRING
The cable lug must be inserted into and through the cable adjuster sleeve held by the bracket on top of the carburetor. Make sure the end of the cable housing is seated positively in the sleeve. The cable lug fits into the slotted fitting as shown.
A HOLE IS PROVIDED FOR THE LUG AT ONE END OF THE SLOT.
Operate the throttle trigger a few times to make sure that it works correctly. Adjust the cable adjuster sleeve so the stop on the carburetor throttle cam just contacts the throttle stop when the throttle trigger is depressed. When the throttle cable is adjusted correctly, tighten the lock nut.
[BCF429H, BCF509H]
Clamp the throttle cable assembly with two bands as shown.
[BC429H]
Clamp the throttle cable assembly as shown.
[BCF429H, BCF509H]
Caution! : This swivel stopper is exclusively for fixing the handle in transport. Do not engage the swivel stopper while operating the brushcutter. In transport and storage:
Loosen the wing nut, place the stopper on A position of the bracket. Tighten the wing nut, confirm the handle is fixed by the swivel stopper. In operation:
Before start operation of the brushcutter, disengage the swivel stopper. Loosen the wing nut, place the stopper at B position. Tighten the wing nut to fix there, confirm the handle becomes free to turn around.
![Maruyama BC2259 - [BCF429H, BCF509H] - 1](/content/2026/06/1226407/images/3d55c515a24fd067982382b43ccd8e901a4bb7292813f892a1dcb25116f33ac1.jpg)
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Screws (4) Loop Handle Shaft Rubber sleeve Nuts (4) Bracket![Maruyama BC2259 - [BCF429H, BCF509H] - 2](/content/2026/06/1226407/images/e79d67363d561d383ee15d1c2bdcda249b63f02e87b315653b354bf7070a2c9a.jpg)
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Stop Switch Wires Matching Connectors![Maruyama BC2259 - [BCF429H, BCF509H] - 3](/content/2026/06/1226407/images/7b3c7eda902f109ebc332b106e076dc4f56515d6ba1e1660b33f08b0d12bc46b.jpg)
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Cable Adjuster Sleeve Lock nut Throttle Cable Cable Lug Carburetor Bracket Slotted fitting Recessed Hole![Maruyama BC2259 - [BCF429H, BCF509H] - 4](/content/2026/06/1226407/images/8021159dacc663aac330b5d46525188f942c6cb3a0b16fd5315c8e053a03ef82.jpg)
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Band (2) Throttle cable assembly [BCF429H, BCF509H]![Maruyama BC2259 - [BCF429H, BCF509H] - 5](/content/2026/06/1226407/images/eef3d6c5e2fc6854cae5627147f0b57dedb2b0d4012bef9d4bca991de84bdd6e.jpg)
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[BC429H]![Maruyama BC2259 - [BCF429H, BCF509H] - 6](/content/2026/06/1226407/images/683947f2bb9d404af0fb671db57a438bc6ad20a9a7ea2c0d98733fa177140046.jpg)
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Bracket "A" Position Swivel Stopper "B" Position Wing Nut [BCF429H, BCF509H]INSTALLING DEBRIS SHIELD
DEBRIS SHIELD
Attach the debris shield to the gearcase with the two M6 x 30 screws as shown on Fig. 1.

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M6 x 30 Screw (2) Gearcase Debris Shield Fig.1SHIELD EXTENSION
(Install the string cutoff blade and shield extension to the debris shield.)
- Insert the square nut into shield extension as shown on Fig. 2.

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Shield extension Square nut Fig.2- Attach the String Cutoff Blade to shield extension using M5 x 20 Screw, locking with square nut (on Fig.2) as shown on Fig. 3.

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String Cut off Blade M5 x 20 Screw Fig.3- Enter the guide in the slot of debris shield on Fig. 4. Make sure place the three hooks into the position on the shield as shown on Fig.5.

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Debris Shield Guide Shield extension Hook Fig.4 Hook Fig.5CUTTING BLADE
A variety of metal cutting blades are available to satisfy different cutting conditions. It is especially important to use only the correct blade(s) approved for each model brushcutter. Also, it is especially important to install the blade for LEFT- HAND rotation (as viewed from the operator's position), and to correctly position all blade holding parts (see sketch).

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Stabilizer Washer Cutting Blade Holding Tool (3.5mm Pin) Boss Adapter Gear case[BC2259, BC2259H, BC329H]

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Stabilizer Washer Cutting Blade Boss Adapter Gearcase Holding Tool (φ 6mm Pin)The two cycle engines used in the brushcutter requires a mixture of GASOLINE and OIL for lubrication of bearings and other moving parts. The proper fuel mixture ratio is 25:1, which is 40cc of oil mixed with one liter of gasoline.
NOTE : Gasoline and oil must be premixed in a clean gasoline container. Never mix gasoline and oil indoors or in the burushcutter fuel tank. Always use fresh gasoline.
WARNING !! - NEVER USE GASOHOL OR ALCOHOL BLENDED FUELS IN MARUYAMA ENGINES.
Before filling the brushcutter fuel tank, clean around the fuel tank cap so dirt and debris does not enter the fuel tank. Always shake the fuel container before filling the fuel tank. Remove the fuel cap, then fill the fuel tank to within about 10mm from the top of the tank. Avoid filling the fuel tank filler neck. Install the cap securely onto the fuel tank.
OPERATING INSTRUCTIONS Starting and Stopping
COLD STARTING PROCEDURE
The carburetor on this engine is equipped with a fuel primer and a choke system. To start a "cold" engine properly, perform the following procedure:
- Pump the primer bulb until fuel can be seen flowing through the fuel return line to the fuel tank. (Flowing fuel should be almost clear, not foamy or full of bubbles.)
- Turn the choke lever to the Close position.
- With the stop switch "ON", and the throttle trigger positioned at Fast-idle position, pull the starter grip.
After the engine is started, turn the choke lever to the Open position. Then squeeze and release the throttle trigger to allow it to return to the idle position.
If the engine stops running before you turn the choke lever to the open position:
Go ahead and open the choke, pull the starter grip with the throttle trigger positioned at Fast-idle position.
HOT RESTART
To start the engine that is already warmed up (hot restart), or if the ambient temperature exceeds 68^(20^) :
- Pump the primer bulb until fuel can be seen flowing through the fuel return line to the fuel tank. (Flowing fuel should be almost clear, not foamy or full of bubbles.)
- Turn the choke lever to the open position, and set the stop switch to the "ON" position.
- Leave the throttle trigger in the idle position and pull the starter grip.
If the engine fails to start after you follow the above procedures, contact an authorized MARUYAMA dealer.

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Choke Lever Starter Grip Primer Bulb Fuel Return Line[BC329H, BC429H, BCF429H, BCF509H]

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Choke Lever Starter grip Primer Bulb Fuel Return Line [BC2259, BC2259H]
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STOP(OFF) START(ON) Stop Switch Fast-idle Start Position Fast-idle start Lock Idle PositionTo Stop The Engine:
- Release the throttle trigger.
- Slide the stop switch to "STOP" position.
CARBURETOR ADJUSTMENT
The carburetor has been carefully adjusted at the factory and should not require any further adjustment. Only the idling speed can be adjusted by turning the idle speed adjustment screw (see sketch). The correct speed for model BC2259, BC2259H and BC329H are 2700 - 3300 RPM, and for others are 2400 - 2800 RPM (or just below the clutch engagement speed). Turning the adjustment screw clockwise will increase the idle speed.
If further adjustment is necessary, please contact a local authorized MARUYAMA dealer.

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Idle Speed Adjustment Screw Increase DecreaseMARUYAMA brushcutters are designed and tested to cut nearly all grasses, thick weeds and brush. As you continue to use the equipment, many tasks will become easier.
CAUTION-Read the SAFETY INSTRUCTIONS concerning the proper use of the brushcutter on page(US-1).
CAUTION-Observe all warnings that appear on the brushcutter.
CAUTION-Use only the correct blade approved for the task and the machine.
CAUTION-Always use the Shoulder Strap or Shoulder Harness when operating a brushcutter with a metal blade. The brushcutter must be positioned to the right side of the operator when used with a metal blade.
CAUTION-Always make certain the blade is installed to rotate in the proper direction and that all holding and fastening parts are correctly secured.
CAUTION-Remove the holding tool ( 3.5 or 6mm pin) before operating the equipment!
CAUTION-Do not continue to use a blade that is dull, damaged, or that vibrates during use. Whenever a cutting blade becomes clogged with debris, immediately stop the machine and clean the blade.
CAUTION-When cutting heavy brush or small trees, use the proper method to avoid dangerous "KICK-BACK" (see sketch).

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No Kick-back Zone Direction of Motion CORRECT
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Direction of Motion DANGER Kick-back Zone INCORRECTREGULAR MAINTENANCE
AIR FILTER
The air filter should be cleaned each time the brushcutter is used. (Or more often with extreme conditions.) Remove the filter cover and take out the element. Wash the element in kerosene or warm detergent, then squeeze it dry. Apply oil (#30 wt.) to foam, removing all excess oil. Assemble and reinstall the element and filter cover.

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Filter Cover Screw Foam Element [BC2259, BC2259H]
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Filter Cover Foam Element
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Filter Cover Foam Element [BC429H, BCF429H, BCF509H][BC329H]SPARK PLUG
The spark plug should be removed from the engine and checked after each 25 hours of operation. The tips can be cleaned with a stiff brush. Adjust the gap to 0,6-0,7mm (see sketch). Replace the spark plug if it is oil_fouled or damaged, the average spark plug life is approximately 100 hours.
CAUTION-Do not over_tighten the spark plug. The correct torque is 10.7-16.6N·m(100 -160 kgf·cm)
CYLINDER COOLING FINS
Loosen the knob (and screw : BC2259,BC2259H) and lift off the cylinder cover. Clean all dirt and debris from the cooling fins and from around the cylinder base. Reinstall the cylinder cover.
FUEL FILTER
The fuel filter is attached to the end of the fuel pick_up hose inside the fuel tank. After each 25 hours of use, it should be checked for dirt or damage, and replaced if necessary. Using a wire hook, gently pull the fuel filter out through the fuel filler opening. Grasp the fuel hose next to the fuel filter fitting and remove the filter, but do not release the hose. While still holding on to fuel hose, attach the new fuel filter. Drop the new fuel filter back into the fuel tank. Make sure that the fuel filter is not stuck in a corner of the tank, and that the fuel hose is not doubled over (kinked) before refueling.
LUBRICATION : GEARCASE
The gearcase should be checked for lubrication after each 30 hours of use. Remove the cutting attachment and the boss adapter. Clean any dirt and debris from the area between the boss adapter and the gearcase. Remove the grease plug from the side of the gearcase. While rotating the attaching shaft, Inject lithium base bearing lube (P/N 211337) through the plug hole until the gearcase is full. Reinstall the boss adapter and grease plug.
GENERAL CLEANING AND TIGHTENING
The MARUYAMA brushcutter will provide maximum performance for many,
many hours if it is maintained properly. Good maintenance includes regular checking of all fasteners for correct tightness, and cleaning the entire machine.
STORAGE
For long term storage of the Brushcutter, perform all regular maintenance procedures and needed repairs. Empty the fuel tank. Start the engine and allow it to run until it stops. Pull the starter cord a few times to remove any excess fuel from the engine. Remove the spark plug and insert a small amount of oil. Pull the starter cord once and bring the piston to a position closest to the spark plug hole. Reinstall the spark plug. Store the brushcutter in a dry place away from excessive heat, sparks or open flame.

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Tips 0.6-0.7mm
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Knob Cylinder Cover Screw Cylinder Cover Screws[BC329H, BC429H, [BC2259, BC2259H] BCF429H, BCF509H]

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Wire Fuel Filter Fuel Pick-up Hose
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Bearing Lube (P/N.211337) Gearcase Grease Plug Plug Hole Boss AdapterAttaching Shaft

Maruyama.
BC2259H
BC329H
BC429H
BCF429H
BCF509H

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59H 29H 29H 29H 509H 1 2 3 4 5 6 8 9 10 11 12 7 15 16 13 14[BC329H, BC429H, BCF429H, BCF509H]
Palanca de Ahogador
Agarrdera de Arranque

Vulva de arranque Tubo de Retorno
[BC2259, BC2259H]
Apagado (OFF)
Prendido (ON)
